How do I make my tank track tread spin?
you can achieve something like that with drivers.
-add a driver on the Y value of your track object.
-open the graph editor and add a Transform Channel driver type like in pic below.
-select the object in &quot;Ob/bone&quot; field that you want to copy the scale value from, I used the default cube's Z Scale channel.
now scaling the cube will spin your Track.
(I don't know how to prevent the scaling of the cube.)

Here is a blend file, I hope this helps.